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在我省的气候条件下,11月上、中旬播种的大麦,一般至次年2、3月才拔节(指拔节期,下同)。但是,由于各种原因,大麦提早拔节的现象在我省麦区常有发生,尤其是早熟春性品种普遍种植以来,更为多见。提早拔节的大麦常常遇到早春低温的危害,致使幼穗受冻,使产量受到一定的影响。但是,由于早拔节的时间不同,拔节后气温的高低以及品种特性的差异等关系,其损失程度是不同的。现将我们在田间观察到的有关情况,参考有关单位的试验与调查材料,谈谈对大麦提早拔节的原因及其预防措施的看法,供参考。一、大麦拔节与冻害的关系根据试验与调查,拔节以后的大麦遇到持续一定时间的0℃以下的低温,麦苗幼穗
In the climate of our province, the barley sowing in mid-November and in mid-November generally took place only in February and March of the following year (referring to the jointing stage and the same below). However, due to various reasons, the phenomenon of early jointing of barley has frequently occurred in the wheat areas of our province, especially since the early spring spring varieties are commonly planted. Prematurely jointed barley often endangered the low temperature in early spring, causing young ear to freeze, which affected the output to a certain extent. However, due to the different time of early jointing, the temperature difference after jointing and the difference of variety characteristics, the degree of loss is different. Now we observe the situation in the field, with reference to the test and investigation of the relevant units, talk about the reasons for the early barnacle of barley and its preventive measures for reference. First, the relationship between barley jointing and frost damage According to the test and investigation, barley after jointing encountered low temperatures below 0 ℃ for a certain period of time,